POLYMER REAGENTS TO REDUCE THE ABSORPTION OF DRILLING MUD DURING DRILLING OF OIL AND GAS WELLS

The absorption of the solution during drilling of oil and gas wells is one of the most common complications that arise in the process, which can cause a significant increase in time spent. The purpose of this work was to create conditions for reducing the rate of absorption of drilling mud during drilling of oil and gas wells. A lightweight drilling and washing liquid was obtained by adding polymer reagents modified with saponified tar from vacuum distillation of fatty acids of cottonseed oil to the clay solution formulation. The results of structural studies of a polymer reagent, polyacrylamide modified with cotton tar, based on IR spectroscopy data are presented. Based on the results of the obtained spectral characteristics of polymer compositions, an assumption is made about the structure of the formed complex, which has swelling properties, which reduces the rate of penetration into the pores of empty rocks, and thereby contributes to the "withdrawal" of the solution into the annulus of the well.

The authors concluded that saponified cotton tar is a valuable raw material for the production of a modified polymer reagent, polyacrylamide. Based on the spectral characteristics, an assumption is made about the structure of the formed complex, which has a strong swelling during penetration into empty rocks. It is assumed that the resulting composite polymer clay solution can be used to reduce the absorption rate of drilling mud during drilling of oil and gas wells.